because they have engne that let theam go in high speed. And if you want to overcome the gravity and go outer space. You must have a speed of 250 000km an hour.
Chat with our AI personalities
Lift
Some planes do like a harier it could stop in the air
As an aircraft's wing moves through the air at speed the air on top of the wing is forced to follow a longer path than the air moving underneath the wing [due to the spahe of the wing] This reduces air pressure on the upper surface of the wing and creates lift.
Yes some do
To reduce air resistance.